Key listening inquiry

  To: comp.lang.java.gui
Dear all,

I'm modifying some codes written before:

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.io.*;

public class Listener implements ActionListener
{
 private BioProject bioProject;

 public Listener(BioProject bioProject)
 {
  this.bioProject = bioProject;
 }

 public void actionPerformed(ActionEvent e)
 {
  JButton jButton = (JButton) e.getSource();

  if(jButton == bioProject.getFileButton())
  {
   FileDialog fileDialog = new FileDialog(bioProject.getJFrame(), "Select
the source file" , FileDialog.LOAD);
   fileDialog.show();

   if(fileDialog.getFile() != null)
    bioProject.readFile( fileDialog.getDirectory() + fileDialog.getFile());
  }
  else if(jButton == bioProject.getPrevious10Button())
   bioProject.previous10();
  else if
.....

 }

}

and then "duplicate" one for key listening, but it does not respond at all
( System.out.print("up") doesn't print anything ). I've already added
addlistener at the bioproject.java, say at jframe, contentpane, display
panel but none of them works. Is that listening unable to work on both mouse
and key events?

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.io.*;

public class KListener implements KeyListener {

 private BioProject bioProject;

 public KListener(BioProject bioProject)
 {
 // super();
  this.bioProject = bioProject;
 }

 public void keyPressed(KeyEvent e) {
    System.out.print("up");

      int Key = e.getKeyCode();
     if(Key == KeyEvent.VK_UP) {
      System.out.print("up");
        bioProject.up();

     } else if(Key == KeyEvent.VK_DOWN) {
      System.out.print("dn");
      bioProject.down();
     } else if(Key == KeyEvent.VK_PAGE_UP) {
      System.out.print("pgup");
      bioProject.previous();
     } else if(Key == KeyEvent.VK_PAGE_DOWN) {
      System.out.print("pgdn");
      bioProject.next();
     }
 }

    public void keyTyped(KeyEvent e) {
        System.out.print("KEY TYPED: ");
    }

    /** Handle the key released event from the text field. */
    public void keyReleased(KeyEvent e) {
        System.out.print("KEY RELEASED: ");
    }
 }

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